A kind of selective separation method of copper and iron in sulfuric acid system cobalt leaching solution

A technology of sulfuric acid system and separation method, which can be applied to the improvement of process efficiency, photographic technology, instruments, etc., which can solve the problems of poor production and operation environment, increased operation and production costs, acid mist and steam escape, and achieve low cost , Process simplification, no secondary environmental pollution effect

Active Publication Date: 2016-03-16
浙江科菲科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process is complicated, the energy consumption of steam is high, and the operation and production costs are increased. There is a large amount of acid mist and steam escaping in the workshop environment, and the production environment is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The sulfuric acid system cobalt leaching solution contains copper sulfate and ferrous sulfate, in which the copper ion content is 10g / l, and the iron ion content is 5g / l. The cobalt leaching solution in the sulfuric acid system is subjected to swirl electrowinning, and the current is set to 400A during the swirl electrowinning process. / m 2 , the tank voltage is 2.0V, and the circulation volume of the electrolytic solution is 12000l / hr. During this process, soda ash solution or limestone slurry is added dropwise to neutralize the acid produced by electrowinning. Soda ash solution or limestone slurry is produced by carbonate and electrowinning. Add in the amount of hydrogen ion molar ratio of 0.5:1. When the pH of the solution reaches 2-3, the iron ions in the solution form complex co-precipitation, and the resulting precipitate is filtered and separated. When the concentration of iron ions in the solution drops to 0.05g / l or below, stop Add soda ash solution or limeston...

Embodiment 2

[0020] The sulfuric acid system cobalt leaching solution contains copper sulfate and ferrous sulfate, in which the copper ion content is 20g / l, and the iron ion content is 10g / l. The cobalt leaching solution in the sulfuric acid system is subjected to swirling electrowinning, and the current is discharged to 600A during the swirling electrowinning process. / m 2 , the tank voltage is 2.5V, and the circulation volume of the electrolytic solution is 13000l / hr. During this process, soda ash solution or limestone slurry is added dropwise to neutralize the acid produced by electrowinning. Soda ash solution or limestone slurry is produced by carbonate and electrowinning. Add in the amount of hydrogen ion molar ratio of 0.6:1. When the pH of the solution reaches 2-3, the iron ions in the solution form complex co-precipitation, and the resulting precipitate is filtered and separated. When the concentration of iron ions in the solution drops to 0.05g / l or below, stop Add soda ash soluti...

Embodiment 3

[0022] The sulfuric acid system cobalt leaching solution contains copper sulfate and ferrous sulfate, in which the copper ion content is 25g / l, and the iron ion content is 20g / l. The cobalt leaching solution in the sulfuric acid system is subjected to swirling electrowinning, and the current is discharged to 1000A during the swirling electrowinning process. / m 2 , the tank voltage is 3.0V, and the circulation volume of the electrolytic solution is 14000l / hr. During this process, soda ash solution or limestone slurry is added dropwise to neutralize the acid produced by electrowinning. Soda ash solution or limestone slurry is produced by carbonate and electrowinning Add hydrogen ions in a molar ratio of 0.7:1. When the pH of the solution reaches 2-3, the iron ions in the solution form complex co-precipitation, and the resulting precipitate is filtered and separated. When the concentration of iron ions in the solution drops to 0.05g / l or below, stop Add soda ash solution or limes...

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PUM

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Abstract

The invention discloses a selective separation method of copper and iron in sulphuric acid system cobalt leachate, and belongs to the technical field of purifying and separating a valuable metal solution regenerated from non-ferrous metals through hydrometallurgy. The method comprises the following process steps: 1) performing cyclone electrowinning on the copper-cobalt-iron-containing sulphuric acid system leachate to separate copper; 2) adding a sodium carbonate solution or limestone slurry in the cyclone electrowinning separation process to regulate the pH value; 3) forming compound co-precipitate by iron ions in different valence states in the solution when the pH value of the electrowinning solution is regulated to 2-3; and 4) filtering and separating the electrowinning solution to obtain an iron-containing precipitate solution and a cobalt-containing precipitate solution, peeling off the copper growing on a cathode to obtain standard copper or crude copper so as to finally realize the selective separation of the copper, iron and cobalt. The process flow is simplified, the use problem of chemical reagents such as an oxidant in the deironing process is solved, and the device cost and the operation cost are reduced.

Description

technical field [0001] The invention belongs to the technical field of purification and separation of valuable metal solutions regenerated by hydrometallurgy of nonferrous metals, and in particular relates to a selective separation method for copper and iron in cobalt leaching solution in a sulfuric acid system. Background technique [0002] In the process of hydrometallurgical extraction and purification of cobalt metal, sulfuric acid solution is used as the medium for acid leaching at atmospheric pressure. The metallurgical operation environment is good, the corrosion to equipment is small, and the derivative products are easy to diversify. In the process of leaching cobalt material, it is necessary to add a reducing agent for leaching of high-valent cobalt. Generally, iron ions in the leaching solution are kept in a divalent state. At present, the methods for separating copper and iron in sulfuric acid medium are as follows: extraction of copper with copper extractant; fu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C1/12
CPCY02P10/20
Inventor 邓涛林元吉侯新常佟永明门海芬
Owner 浙江科菲科技股份有限公司
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